Carrier 48SX024-060 User manual

Brand: Carrier

Model: 48SX024-060

Category: Split-system air conditioners

Type: User manual

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS .................1-9

General ......................................1

RECEIVING AND INSTALLATION ...........10-22

Step 1 — Check Equipment ..................10

• IDENTIFY UNIT

• INSPECT SHIPMENT

Step 2 — Provide Unit Support ..............10

• ROOF CURB

• SLAB MOUNT

• FLUSH MOUNT

Step 3 — Field Fabricate Ductwork ...........10

Step 4 — Provide Clearances ................10

Step 5 — Rig and Place Unit .................10

• UNITS WITHOUT BASE RAIL

• UNITS WITH OPTIONAL BASE RAIL

Step 6 — Connect Condensate Drain .........13

Step 7 — Install Flue Hood ..................13

Step 8 — Install Gas Piping ..................13

Step 9 — Install Duct Connections ...........16

• CONFIGURING UNITS FOR DOWNFLOW

(VERTICAL) DISCHARGE

Step 10 — Install Electrical Connections .....18

• HIGH-VOLTAGE CONNECTIONS

• SPECIAL PROCEDURES FOR 208-V

OPERATION

• CONTROL VOLTAGE CONNECTIONS;

NON-INTEGRATED CONTROL MOTOR

(NON-ICM) UNITS

• CONTROL VOLTAGE CONNECTIONS;

INTEGRATED CONTROL MOTOR (ICM)

UNITS

• HEAT ANTICIPATOR SETTING

• TRANSFORMER PROTECTION

PRE-START-UP ............................22,23

START-UP ................................23-44

MAINTENANCE ............................44-47

TROUBLESHOOTING ......................48-50

START-UP CHECKLIST .....................CL-1

NOTE TO INSTALLER — Before the installation, READ

THESE INSTRUCTIONS CAREFULLY AND COM-

PLETELY.Also, make sure the User’s Manual and Replace-

ment Guide are left with the unit after installation. The fur-

nace is NOT to be used for temporary heating of buildings

or structures under construction.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment

can be hazardous due to system pressure and electrical com-

ponents. Only trained and qualiﬁed personnel should install,

repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance func-

tions of cleaning coils and ﬁlters.All other operations should

be performed by trained service personnel. When working

on air-conditioning equipment, observe precautions in the

literature, tags and labels attached to the unit, and other safety

precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloth for unbrazing operations. Have ﬁre ex-

tinguisher available for all brazing operations.

Improper installation, adjustment, alteration, service, main-

tenance, or use can cause carbon monoxide poisoning,

ﬁre, or an explosion which can result in personal injury

or unit damage. Consult a qualiﬁed installer, service agency,

or gas supplier for information or assistance. The quali-

ﬁed installer or agency must use only factory-authorized

kits or accessories when modifying this product.

Before performing service or maintenance operations on

unit, turn off gas supply then unit main power switch.

Electrical shock could cause personal injury.

General — The 48SS,SX units (see Fig. 1) are fully self-

contained, combination Category I gas heating/electric cool-

ing units designed for outdoor installation. See Fig. 2-9

(pages 2-9) for unit dimensions. All unit sizes have dis-

charge openings for both horizontal and downﬂow conﬁgu-

rations, and are factory shipped with all 4 duct openings covered.

Units may be installed either on a rooftop or a ground-level

cement slab. See Fig. 10 for roof curb dimensions.

Fig. 1 — Unit 48SX Shown With Optional Base Rail

48SS018-060

48SX024-060

Single Package Gas Heating/

Electric Cooling Units

Manufacturer reserves the right to discontinue, or change at any time, speciﬁcations or designs without notice and without incurring obligations.

Book 1 4

Tab 1a 6a

PC 111 Catalog No. 534-721 Printed in U.S.A. Form 48SS,SX-12SI Pg 1 9-98 Replaces: 48SS,SX-11SI

REQ’D CLEARANCES FOR SERVICING. in. (mm)

Duct panel .............................0

Unit top ...........................36(914)

Side opposite ducts .....................36(914)

Compressor access .....................36(914)

(Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)

Maximum extension of overhangs ...............48(1219)

Unit top ...........................14(356)

Duct side of unit ........................2(51)

Side opposite ducts .....................14(356)

Bottom of unit ...........................0

Flue panel .........................36(914)

NEC REQ’D CLEARANCES. in. (mm)

Between units, control box side ................42(1067)

Unit and ungrounded surfaces, control box side .........36(914)

Unit and block or concrete walls and other grounded

surfaces, control box side ..................42(1067)

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

CORNER WEIGHT

(lb/kg)

UNIT HEIGHT

(in./mm)

lbkgABCD E

48SS180040 208/230-1-60 272 123 81/37 62/28 76/35 53/24 24.1/613

48SS024040 208/230-1-60 303 138 97/44 43/20 123/56 40/18 24.1/613

48SS024060 208/230-1-60 315 143 100/45 46/21 126/57 43/20 24.1/613

48SS030040 208/230-1-60, 208/230-3-60 320 145 100/45 47/21 126/57 47/21 24.1/613

48SS030060/080 208/230-1-60, 208/230-3-60 332 149 103/46 50/22 129/58 50/23 24.1/613

48SS036060/080 208/230-1-60, 208/230-3-60, 460-3-60 336 153 86/39 76/35 111/50 63/29 24.1/613

48SS036100/120 208/230-1-60, 208/230-3-60, 460-3-60 348 158 89/40 79/36 114/52 66/30 24.1/613

48SS042060/080 208/230-1-60, 208/230-3-60, 460-3-60 375 170 95/43 86/39 119/54 75/34 28.1/714

48SS042100/120 208/230-1-60, 208/230-3-60, 460-3-60 387 176 98/45 89/40 122/55 78/35 28.1/714

UNIT

in./mm

CENTER OF GRAVITY in./mm

XYZ

48SS018040

⁄

/420.7 18

⁄

/481.0

25.07/637 20.59/523

10.85/276

48SS024040 27.07/688 23.35/593

48SS024060 26.98/685 23.27/591

48SS030040 26.71/678 23.46/596

48SS030060/080 27.15/689 22.36/568

48SS036060/080 27.50/698 22.48/571

48SS036100/120 27.40/696 22.44/570

48SS042060/080

⁄

/522.3 22

⁄

/582.6

27.01/686 22.44/570

12.7/321

48SS042100/120 26.94/684 22.44/570

LEGEND

CG — Center of Gravity

COND — Condenser

LV — Low Voltage

MAT’L — Material

NEC — National Electrical Code

REQ’D — Required

NOTES:

1. Clearances mustbemaintained topreventrecirculation ofairfrom outdoor-

fan discharge.

2. Adequate clearance around airopenings into combustionchamber must

be provided.

Fig. 2 — 48SS018-042 Without Base Rail, Unit Dimensions

REQ’D CLEARANCES FOR SERVICING. in. (mm)

Duct panel .............................0

Unit top ...........................36(914)

Side opposite ducts .....................36(914)

Compressor access .....................36(914)

(Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)

Maximum extension of overhangs ...............48(1219)

Unit top ...........................14(356)

Duct side of unit ........................2(51)

Side opposite ducts .....................14(356)

Bottom of unit ...........................0

Flue panel .........................36(914)

NEC REQ’D CLEARANCES. in. (mm)

Between units, control box side ................42(1067)

Unit and ungrounded surfaces, control box side .........36(914)

Unit and block or concrete walls and other grounded

surfaces, control box side ..................42(1067)

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

CORNER WEIGHT

(lb/kg)

UNIT HEIGHT

(in./mm)

lbkgABCD E

48SS018040 208/230-1-60 296 135 87/40 68/31 82/37 59/27 27.4/697

48SS024040 208/230-1-60 327 149 103/47 49/22 129/59 46/21 27.4/697

48SS024060 208/230-1-60 339 155 106/48 52/24 132/60 49/22 27.4/697

48SS030040 208/230-1-60, 208/230-3-60 344 157 106/48 53/24 132/60 53/24 27.4/697

48SS030060/080 208/230-1-60, 208/230-3-60 356 162 102/46 71/32 123/56 60/27 27.4/697

48SS036060/080 208/230-1-60, 208/230-3-60, 460-3-60 360 164 92/42 82/37 117/53 69/31 27.4/697

48SS036100/120 208/230-1-60, 208/230-3-60, 460-3-60 372 169 95/43 85/39 120/55 72/33 27.4/697

48SS042060/080 208/230-1-60, 208/230-3-60, 460-3-60 399 181 101/46 92/42 125/57 81/37 31.4/798

48SS042100/120 208/230-1-60, 208/230-3-60, 460-3-60 411 187 104/47 95/43 128/58 84/38 31.4/798

UNIT

in./mm

CENTER OF GRAVITY in./mm

XYZ

48SS018040

⁄

/504.8 22

⁄

/565.4

25.04/636 22.72/577

13.16/334.3

48SS024040 26.90/683.3 20.17/512.3

48SS024060 26.82/681.2 20.22/513.6

48SS030040 26.57/674.9 20.1 /509.3

48SS030060/080 26.93/684 21.1 /535.4

48SS036060/080 27.31/693.7 21.0 /532.6

48SS036100/120 27.23/691.6 21.0 /533.1

48SS042060/080

⁄

/606.4 26

⁄

/666.8

26.87/682.5 21.0 /533.1

14.96/380

48SS042100/120 26.81/681 21.0 /533.7

LEGEND

CG — Center of Gravity

COND — Condenser

LV — Low Voltage

MAT’L — Material

NEC — National Electrical Code

REQ’D — Required

NOTES:

1. Clearances mustbemaintained topreventrecirculation ofairfrom outdoor-

fan discharge.

2. Adequate clearance around airopenings into combustionchamber must

be provided.

Fig. 3 — 48SS018-042 With Optional Base Rail, Unit Dimensions

REQ’D CLEARANCES FOR SERVICING. in. (mm)

Duct panel .............................0

Unit top ...........................36(914)

Side opposite ducts .....................36(914)

Compressor access .....................36(914)

(Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)

Maximum extension of overhangs ...............48(1219)

Unit top ...........................14(356)

Duct side of unit ........................2(51)

Side opposite ducts .....................14(356)

Bottom of unit ...........................0

Flue panel .........................36(914)

NEC REQ’D CLEARANCES. in. (mm)

Between units, control box side ................42(1067)

Unit and ungrounded surfaces, control box side .........36(914)

Unit and block or concrete walls and other grounded

surfaces, control box side ..................42(1067)

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

CORNER WEIGHT

(lb/kg)

lb kg A B C D

48SS048080 208/230-1-60, 208/230-3-60, 460-3-60 414 188 107/49 83/38 158/72 66/30

48SS048100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 426 193 110/50 86/39 159/72 71/32

48SS060080 208/230-1-60, 208/230-3-60, 460-3-60 453 206 117/53 93/42 167/76 76/35

48SS060100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 465 211 120/55 96/44 167/76 82/37

UNIT

CENTER OF GRAVITY (in./mm)

XYZ

48SS048080 28.76/731 23.46/596 15.35/390

48SS048100/120/140 28.42/722 23.42/595 15.35/390

48SS060080 28.36/720 23.27/591 15.35/390

48SS060100/120/140 27.95/710 23.23/590 15.35/390

LEGEND

CG — Center of Gravity

COND — Condenser

LV — Low Voltage

MAT’L — Material

NEC — National Electrical Code

REQ’D — Required

NOTES:

1. Clearances mustbemaintained topreventrecirculation ofairfrom outdoor-

fan discharge.

2. Adequate clearance around airopenings into combustionchamber must

be provided.

Fig. 4 — 48SS048,060 Without Base Rail, Unit Dimensions

REQ’D CLEARANCES FOR SERVICING. in. (mm)

Duct panel .............................0

Unit top ...........................36(914)

Side opposite ducts .....................36(914)

Compressor access .....................36(914)

(Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)

Maximum extension of overhangs ...............48(1219)

Unit top ...........................14(356)

Duct side of unit ........................2(51)

Side opposite ducts .....................14(356)

Bottom of unit ...........................0

Flue panel .........................36(914)

NEC REQ’D CLEARANCES. in. (mm)

Between units, control box side ................42(1067)

Unit and ungrounded surfaces, control box side .........36(914)

Unit and block or concrete walls and other grounded

surfaces, control box side ..................42(1067)

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

CORNER WEIGHT

(lb/kg)

lb kg A B C D

48SS048080 208/230-1-60, 208/230-3-60, 460-3-60 438 199 113/51 89/40 164/75 72/33

48SS048100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 450 205 116/53 92/42 165/75 77/35

48SS060080 208/230-1-60, 208/230-3-60, 460-3-60 477 217 123/56 99/45 173/79 82/37

48SS060100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 489 222 126/57 102/46 173/79 88/40

UNIT

CENTER OF GRAVITY (in./mm)

XYZ

48SS048080 28.54/724.9 20.00/508 17.66/448.6

48SS048100/120/140 28.22/716.8 20.05/509.3 17.66/448.6

48SS060080 28.18/715.6 20.19/512.8 17.66/448.6

48SS060100/120/140 27.79/705.9 20.23/513.8 17.66/448.6

LEGEND

CG — Center of Gravity

COND — Condenser

LV — Low Voltage

MAT’L — Material

NEC — National Electrical Code

REQ’D — Required

NOTES:

1. Clearances mustbemaintained topreventrecirculation ofairfrom outdoor-

fan discharge.

2. Adequate clearance around airopenings into combustionchamber must

be provided.

Fig. 5 — 48SS048,060 With Optional Base Rail, Unit Dimensions

REQ’D CLEARANCES FOR SERVICING. in. (mm)

Duct panel .............................0

Unit top ...........................36(914)

Side opposite ducts .....................36(914)

Compressor access .....................36(914)

(Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)

Maximum extension of overhangs ...............48(1219)

Unit top ...........................14(356)

Duct side of unit ........................2(51)

Side opposite ducts .....................14(356)

Bottom of unit ...........................0

Flue panel .........................36(914)

NEC REQ’D CLEARANCES. in. (mm)

Between units, control box side ................42(1067)

Unit and ungrounded surfaces, control box side .........36(914)

Unit and block or concrete walls and other grounded

surfaces, control box side ..................42(1067)

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

CORNER WEIGHT

(lb/kg)

lbkgABCD

48SX024040 208/230-1-60 333 151 104/47 50/23 130/59 49/22

48SX024060 208/230-1-60 345 157 107/49 53/24 133/60 52/24

48SX030040 208/230-1-60 336 153 97/44 66/30 118/54 55/25

48SX030060/080 208/230-1-60 348 158 100/45 69/31 121/55 58/26

48SX036060/080 208/230-1-60, 208/230-3-60, 460-3-60 366 166 94/43 84/38 117/53 71/32

48SX036100/120 208/230-1-60, 208/230-3-60, 460-3-60 378 172 97/44 87/40 120/55 74/34

UNIT

CENTER OF GRAVITY (in./mm)

XYZ

48SX024040 26.71/678 20.06/510 12.65/321

48SX024060 26.64/677 20.12/511 12.65/321

48SX030040 27.06/687 21.05/535 12.65/321

48SX030060/080 26.98/685 21.07/535 12.65/321

48SX036060/080 27.14/689 21.10/536 12.65/321

48SX036100/120 27.06/687 21.12/536 12.65/321

LEGEND

CG — Center of Gravity

COND — Condenser

LV — Low Voltage

MAT’L — Material

NEC — National Electrical Code

REQ’D — Required

NOTES:

1. Clearances mustbemaintained topreventrecirculation ofairfrom outdoor-

fan discharge.

2. Adequate clearance around airopenings into combustionchamber must

be provided.

Fig. 6 — 48SX024-036 Without Base Rail, Unit Dimensions

REQ’D CLEARANCES FOR SERVICING. in. (mm)

Duct panel ...........................0

Unit top .........................36(914)

Side opposite ducts ....................36(914)

Compressor access ....................36(914)

(Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)

Maximum extension of overhangs .............48(1219)

Unit top .........................14(356)

Duct side of unit ......................2(51)

Side opposite ducts ....................14(356)

Bottom of unit .........................0

Flue panel ........................36(914)

NEC REQ’D CLEARANCES. in. (mm)

Between units, control box side ..............42(1067)

Unit and ungrounded surfaces, control box side .......36(914)

Unit and block or concrete walls and other grounded

surfaces, control box side ................42(1067)

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

CORNER WEIGHT

(lb/kg)

lb kg A B C D

48SX024040 208/230-1-60 357 163 110/50 56/25 136/62 55/25

48SX024060 208/230-1-60 369 168 113/51 59/27 139/63 58/26

48SX030040 208/230-1-60 360 164 103/47 72/33 124/56 61/28

48SX030060/080 208/230-1-60 372 169 106/48 75/34 127/58 64/29

48SX036060/080 208/230-1-60, 208/230-3-60, 460-3-60 390 177 100/45 90/41 123/56 77/35

48SX036100/120 208/230-1-60, 208/230-3-60, 460-3-60 402 183 103/47 93/42 127/57 80/36

UNIT

CENTER OF GRAVITY (in./mm)

XYZ

48SX024040 26.57/674.9 20.17/512.3 14.96/380.0

48SX024060 26.51/673.3 20.22/513.6 14.96/380.0

48SX030040 26.90/683.3 21.09/535.7 14.96/380.0

48SX030060/080 26.83/681.5 21.11/536.2 14.96/380.0

48SX036060/080 26.99/685.5 21.14/537.0 14.96/380.0

48SX036100/120 26.92/683.8 21.14/537.0 14.96/380.0

LEGEND

CG — Center of Gravity

COND — Condenser

LV — Low Voltage

MAT’L — Material

NEC — National Electrical Code

REQ’D — Required

NOTES:

1. Clearances mustbemaintained topreventrecirculation ofairfrom outdoor-

fan discharge.

2. Adequate clearance around airopenings into combustionchamber must

be provided.

Fig. 7 — 48SX024-036 With Optional Base Rail, Unit Dimensions

REQ’D CLEARANCES FOR SERVICING. in. (mm)

Duct panel .............................0

Unit top ...........................36(914)

Side opposite ducts .....................36(914)

Compressor access .....................36(914)

(Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)

Maximum extension of overhangs ...............48(1219)

Unit top ...........................14(356)

Duct side of unit ........................2(51)

Side opposite ducts .....................14(356)

Bottom of unit ...........................0

Flue panel .........................36(914)

NEC REQ’D CLEARANCES. in. (mm)

Between units, control box side ................42(1067)

Unit and ungrounded surfaces, control box side .........36(914)

Unit and block or concrete walls and other grounded

surfaces, control box side ..................42(1067)

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

CORNER WEIGHT

(lb/kg)

lbkgABCD

48SX042060/080 208/230-1-60, 208/230-3-60, 460-3-60 391 178 100/45 91/41 120/55 80/36

48SX042100/120 208/230-1-60, 208/230-3-60, 460-3-60 403 183 103/47 94/43 123/56 83/38

48SX048080 208/230-1-60, 208/230-3-60, 460-3-60 422 192 109/50 85/39 158/72 70/32

48SX048100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 434 197 112/51 88/40 161/73 73/33

48SX060080 208/230-1-60, 208/230-3-60 453 206 117/53 93/42 167/76 76/35

48SX060100/120/140 208/230-1-60, 208/230-3-60 465 211 120/55 96/44 167/76 82/37

UNIT

CENTER OF GRAVITY (in./mm)

XYZ

48SX042060/080 26.66/677 21.19/538 15.35/390

48SX042100/120 26.61/676 21.21/539 15.35/390

48SX048080 28.45/723 19.95/507 15.35/390

48SX048100/120/140 28.35/720 19.99/508 15.35/390

48SX060080 28.36/720 23.27/591 15.35/390

48SX060100/120/140 27.95/710 23.23/590 15.35/390

LEGEND

CG — Center of Gravity

COND — Condenser

LV — Low Voltage

MAT’L — Material

NEC — National Electrical Code

REQ’D — Required

NOTES:

1. Clearances mustbemaintained topreventrecirculation ofairfrom outdoor-

fan discharge.

2. Adequate clearance around airopenings into combustionchamber must

be provided.

Fig. 8 — 48SX042-060 Without Base Rail, Unit Dimensions

REQ’D CLEARANCES FOR SERVICING. in. (mm)

Duct panel .............................0

Unit top ...........................36(914)

Side opposite ducts .....................36(914)

Compressor access .....................36(914)

(Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)

Maximum extension of overhangs ...............48(1219)

Unit top ...........................14(356)

Duct side of unit ........................2(51)

Side opposite ducts .....................14(356)

Bottom of unit ...........................0

Flue panel .........................36(914)

LEGEND

CG — Center of Gravity

COND — Condenser

LV — Low Voltage

MAT’L — Material

NEC — National Electrical Code

REQ’D — Required

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

CORNER WEIGHT

(lb/kg)

lb kg A B C D

48SX042060,080 208/230-1-60, 208/230-3-60, 460-3-60 415 189 106/48 97/44 126/57 86/39

48SX042100,120 208/230-1-60, 208/230-3-60, 460-3-60 427 194 109/50 100/45 129/59 89/40

48SX048080 208/230-1-60, 208/230-3-60, 460-3-60 446 293 115/52 91/41 164/75 76/35

48SX048100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 458 208 118/54 94/43 167/76 79/36

48SX060080 208/230-1-60, 208/230-3-60 477 217 123/56 99/45 173/79 82/37

48SX060100/120/140 208/230-1-60, 208/230-3-60 489 222 126/57 102/46 173/79 88/40

UNIT

CENTER OF GRAVITY (in./mm)

XYZ

48SX042060,080 26.55/674.4 21.22/539.0 17.66/448.6

48SX042100,120 26.50/673.0 21.24/539.6 17.66/448.6

48SX048080 28.25/717.6 20.04/509.0 17.66/448.6

48SX048100/120/140 28.16/715.3 20.08/510.0 17.66/448.6

48SX060080 28.18/715.6 20.19/512.8 17.66/448.6

48SX060100/120/140 27.79/705.9 20.23/513.8 17.66/448.6

NOTES:

1. Clearances must be maintained to prevent recirculation of air from outdoor-

fan discharge.

2. Adequate clearance around air openings into combustion chamber must be

provided.

NEC REQ’D CLEARANCES. in. (mm)

Between units, control box side ................42(1067)

Unit and ungrounded surfaces, control box side .........36(914)

Unit and block or concrete walls and other grounded

surfaces, control box side ..................42(1067)

Fig. 9 — 48SX042-060 With Optional Base Rail, Unit Dimensions

RECEIVING AND INSTALLATION

Step 1 — Check Equipment

IDENTIFYUNIT — The unit model number and serial num-

ber are stamped on unit identiﬁcation plate. Check this

information against shipping papers and job data.

INSPECT SHIPMENT — Inspect for shipping damage while

unit is still on shipping pallet. If unit appears to be damaged

or is torn loose from its anchorage, have it examined by trans-

portation inspectors before removal. Forward claim papers

directly to transportation company. Manufacturer is not re-

sponsible for any damage incurred in transit.

Check all items against shipping list. Immediately notify

the nearest Carrier Air Conditioning office if any item is

missing.

To prevent loss or damage, leave all parts in original pack-

ages until installation.

Step 2 — Provide Unit Support

ROOF CURB — Install accessory roof curb in accordance

with instructions shipped with curb. See Fig. 10 for roof curb

dimensions. Install insulation, cant strips, rooﬁng, and ﬂash-

ing. Ductwork must be attached to curb.

IMPORTANT: The gasketing of the unit to the roof

curb is critical for a watertight seal. Install gasketing

material supplied with the roof curb. Improperly ap-

plied gasketing can also result in air leaks and poor

unit performance.

Curb should be level to within

⁄

inch. This is necessary

for unit drain to function properly. Refer to accessory roof

curb installation instructions for additional information as

required.

SLAB MOUNT — Place the unit on a solid, level concrete

pad that is a minimum of 4 in. thick with 2 in. above grade.

The slab should be ﬂush on the front of the unit (to allow

condensate drain installation) and should extend 2 in. on the

three remaining sides of the unit. See Fig. 11. Install a 6-in.

gravel apron in front of condenser-air inlets to prevent ob-

struction of airﬂow by grass or shrubs. Do not secure the

unit to the slab except when required by local codes.

FLUSH MOUNT — Place side of unit with duct panel ﬂush

against transition. On units with optional base rails, the skirt

on duct-panel side of unit can be removed to allow unit to

be mounted ﬂush against transitions that extend below base-

pan of unit. To remove skirt, remove 4 screws holding skirt

to base rail. Then, remove skirt.

To remove wood support under unit (with base rail only),

loosen 4 screws above rigging holes and slide assembly out

through rectangular hole.

Step 3 — Field Fabricate Ductwork — Secure all

ducts to roof curb and building structure on vertical dis-

charge units. Do not connect ductwork to unit. For horizon-

tal applications, unit is provided with ﬂanges on the horizontal

openings. All ductwork should be secured to the ﬂanges. In-

sulate and weatherproof all external ductwork, joints, and

roof openings with counter ﬂashing and mastic in accor-

dance with applicable codes.

Ducts passing through an unconditioned space must be

insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return

should be ducted through the roof deck to comply with ap-

plicable ﬁre codes.

A minimum clearance is not required around ductwork.

Cabinet return-air static shall not exceed −.25 in. wg.

Step 4— Provide Clearances — The required mini-

mum operating and service clearances are shown in

Fig. 2-9. Adequate combustion, ventilation, and condenser

air must be provided, in accordance with section 5.3,Air for

Combustion and Ventilation, of the National Fuel Gas Code

ANSI (American National Standards Institute) Z223.1 (in

Canada, sections 7.2, 7.3 or 7.4 or Can/CGA [Canadian Gas

Association] B149 Installation Codes), or applicable provi-

sions of local building code.

Do not restrict condenser airﬂow. An air restriction at

either the outdoor-air inlet or the fan discharge can be

detrimental to compressor life.

The condenser fan pushes air through the condenser coil

and discharges it through the bank of louvers in the top cover,

the decorative grille on the right side of the unit, and the

compressor access panel. Be sure that the fan discharge does

not recirculate to the condenser coil. Do not locate the unit

in either a corner or under an overhead obstruction. The mini-

mum clearance under a partial overhang (such as a normal

house overhang) is 48-in. above the unit top. The maximum

horizontal extension of a partial overhang must not exceed

48 inches.

Do not place the unit where water, ice, or snow from an

overhang or roof will damage or ﬂood the unit. Do not in-

stall the unit on carpeting, tile, or other combustible mate-

rials. The unit may be installed on wood ﬂooring or on

Class A, B, or C roof covering materials.

Step 5 — Rig and Place Unit

When installing the unit on a rooftop, be sure the roof

will support the additional weight. Refer to Fig. 2-9 for

corner weight information.

Use spreader bars or crate top when rigging the unit. The

units must be rigged for lifting as shown in Fig. 12 and 13.

Refer to Tables 1 and 2 for operating weight and to Fig. 2-9

for corner weights. Use extreme caution to prevent damage

when moving the unit. Unit must remain in an upright po-

sition during all rigging and moving operations. The unit

must be level for proper condensate drainage; therefore, the

ground-level pad or accessory roof curb must be level be-

fore setting the unit in place. When a ﬁeld-fabricated sup-

port is used, be sure that the support is level and properly

supports the unit.

PART NUMBER ‘‘A’’

FLAT

CURB

CPRFCURB001A00 89 [203]

CPRFCURB002A00 119 [279]

CPRFCURB003A00 149 [356]

NOTES:

1. Roof curb must be set up for unit being installed.

2. Seal strip must be applied as required for unit being installed.

3. Dimensions in [ ] are in millimeters.

4. Roof curb is made of 16 gage steel.

5. Attach ductwork to curb (ﬂanges of duct rest on curb).

6. Service clearance 4 ft on each side.

7. Direction of airﬂow.

8. Insulated panels: 1-in. thick ﬁberglass 1 lb density.

Fig. 10 — Roof Curb Dimensions

UNITS WITHOUT BASE RAIL — If accessory rigging

brackets are to be used for rigging, install them as follows:

Secure screws and paint protectors solidly against unit

basepan to hold lifting brackets in position.

Never use lifting brackets when the temperature is be-

low −10 F.

Never exceed 200 lbs per bracket of lifting force.

Never use lifting brackets for lifting other models of air-

conditioning units.

Lifting point should be directly over the unit center of

gravity.

1. Position brackets as close to the corners of unit as pos-

sible. Be sure brackets are well outside of center of grav-

ity. (See Fig. 2, 4, 6, 8, and 12.).

2. Position paint protectors and foam strips between screws

and painted surface of unit.Tightenscrews until they make

contact with the paint protectors.

3. Secure device or hook of sufficient strength to hole in bracket

as shown in detail ‘‘A’’ of Fig. 12.

4. If wood top is available, use it for a spreader bar to pre-

vent straps from damaging unit. If wood top is not avail-

able, use spreader bars of sufficient length.

Fig. 11 — Slab Mounting Details

NOTICE TO RIGGERS

Hook rigging shackles through holes in lifting brackets, as shown in

Detail ‘‘A.’’ Lifting brackets to be centered around the unit center of

gravity. Use wooden top skid when rigging, to prevent rigging straps

from damaging unit.

All panels must be in place when rigging.

UNIT

48SS

MAX

WEIGHT

ABC

Size lb kg in. mm in. mm in. mm

018 332 150

49.4 1255

24.3 618 24.85 631

024 375 170 22.4 570 24.85 631

030 384 174 22.3 565 24.85 631

036 408 185 22.0 559 24.85 631

042 447 203 22.5 571 28.85 733

048 486 220 21.0 533 34.85 885

060 525 238 21.5 545 34.85 885

UNIT

48SX

024 405 184

49.4 1255

22.8 579 28.9 733

030 408 185 22.4 569 28.9 733

036 438 199 22.4 569 28.9 733

042 463 210 22.8 579 34.9 885

048 494 224 21.1 536 34.9 885

060 525 238 21.5 545 34.9 885

Fig. 12 — Suggested Rigging for Units Without

Base Rail

NOTICE TO RIGGERS

Hook rigging shackles through holes in lifting brackets, as shown in

Detail ‘‘A.’’ Lifting brackets to be centered around the unit center of

gravity. Use wood top skid when rigging, to prevent rigging straps

from damaging unit. Remove 4 screws to slide wood support through

rectangular hole in rail.

All panels must be in place when rigging.

UNIT

48SS

MAX

WEIGHT

ABC

Size lb kg in. mm in. mm in. mm

018 320 145

49.4 1255

24.4 619 28.2 715

024 363 165 22.6 574 28.2 715

030 380 172 22.5 571 28.2 715

036 396 180 22.2 563 28.2 715

042 435 197 22.6 574 32.2 816

048 474 215 21.2 538 38.2 969

060 513 233 21.6 549 38.2 969

UNIT

48SX

024 393 178

49.4 1255

22.9 582 32.2 816

030 396 180 22.6 574 32.2 816

036 426 193 22.5 571 32.2 816

042 451 205 22.9 582 38.2 969

048 482 219 21.3 540 38.2 969

060 513 233 21.6 549 38.2 969

Fig. 13 — Suggested Rigging for Units With

Optional Base Rail

UNITS WITH OPTIONAL BASE RAIL — Lifting holes

are provided in optional base rail as shown in Fig. 13. Op-

erating weights are shown in Tables 1 and 2. Refer to rig-

ging instructions on unit.

Protective wood support must be removed from unit be-

fore unit is mounted to curb. Remove 4 screws that secure

support above rigging holes in rails. Slide support out through

rectangular hole in rail. See Fig. 13.

Step 6 — Connect Condensate Drain

NOTE: When installing condensate drain connection be sure

to comply with local codes and restrictions.

Model 48SS,SX disposes of condensate water through a

⁄

in. NPT ﬁtting which exits through the compressor access

panel. See Fig. 2-9 for location.

Condensate water can be drained directly onto the roof in

rooftop installations (where permitted) or onto a gravel apron

in ground-level installations. Install a ﬁeld-supplied conden-

sate trap at end of condensate connection to ensure proper

drainage. Make sure that the outlet of the trap is at least

1 in. lower than the drain-pan condensate connection to pre-

vent the pan from overﬂowing. See Fig. 14. Prime the trap

with water. When using a gravel apron, make sure it slopes

away from the unit.

If the installation requires draining the condensate water

away from the unit, install a 2-in. trap at the condensate con-

nection to ensure proper drainage. See Fig. 14. Make sure

that the outlet of the trap is at least 1 in. lower than the drain-

pan condensate connection to prevent the pan from over-

ﬂowing. Prime the trap with water. Connect a drain tube us-

ing a minimum of

⁄

-in. PVC or

⁄

-in. copper pipe (all ﬁeld-

supplied) at the outlet end of the 2-in. trap. Do not undersize

the tube. Pitch the drain tube downward at a slope of at least

one in. for every 10 ft of horizontal run. Be sure to check the

drain tube for leaks.

Step 7 — Install Flue Hood — The ﬂue hood as-

sembly is shipped screwed to the control box in the burner

compartment. Remove the burner access panel to locate the

assembly.

For units being installed in California Air Quality Man-

agement Districts which require NO

emissions of

40 nanograms/joule or less, kit CRLOWNOX001A00 must

be installed.

The venting system is designed to ensure proper vent-

ing. The ﬂue hood assembly must be installed as indi-

cated in this section of the unit installation instructions.

Install the ﬂue hood as follows:

1. This installation must conform with local building codes

and with the National Fuel Gas Code (NFGC),ANSIZ223.1

(in Canada, CAN/CGAB149.1, and B149.2) or NFPA(Na-

tional Fire Protection Association) latest revision. Refer

to Provincial and local plumbing or wastewater codes and

other applicable local codes.

2. Remove from shipping location. Place vent cap assembly

over ﬂue panel. Orient screw holes in vent cap with holes

in the ﬂue panel.

3. Secure ﬂue hood to ﬂue panel by inserting a single screw

on the right side, the left side, and the top of the hood.

Step 8 — Install Gas Piping — The gas supply pipe

enters the unit through the access hole provided. The gas

connection to the unit is made to the

⁄

-in. FPT gas inlet on

the manual shutoff or gas valve.

Install a gas supply line that runs to the heating section.

Refer to Table 3 and the NFGC for gas pipe sizing. Do not

use cast-iron pipe. It is recommended that a black iron pipe

is used. Check the local utility for recommendations con-

cerning existing lines. Size gas supply piping for 0.5 in. wg

maximum pressure drop. Never use pipe smaller than the

⁄

-in. FPT gas inlet on the unit gas valve.

For natural gas applications, the gas pressure at unit gas

connection must not be less than 4.0 in. wg or greater than

13 in. wg while the unit is operating. For propane applica-

tions, the gas pressure must not be less than 4.0 in. wg or

greater than 13 in. wg at the unit connection.

⁄

-in. NPT plugged tapping accessible for test gage

connection must be installed immediately upstream of the

gas supply connection to the furnace.

When installing the gas supply line, observe local codes

pertaining to gas pipe installations. Refer to the NFGC ANSI

Z223.1-1988 NFPA latest edition (in Canada, CAN/CGA

B149.1, (2)-M86). In the absence of local building codes,

adhere to the following pertinent recommendations:

1. Avoid low spots in long runs of pipe. Grade all pipe

⁄

inch in every 15 ft to prevent traps. Grade all hori-

zontal runs downward to risers. Use risers to connect to

heating section and to meter.

2. Protect all segments of piping system against physical and

thermal damage. Support all piping with appropriate straps,

hangers, etc. Use a minimum of one hanger every 6 ft.

For pipe sizes larger than

⁄

in., follow recommendations

of national codes.

3. Apply joint compound (pipe dope) sparingly and only to

male threads of joint when making pipe connections. Use

only pipe dope that is resistant to action of liqueﬁed

petroleum gases as speciﬁed by local and/or national codes.

Never use Teﬂon tape.

4. Install sediment trap in riser leading to heating section

per Fig. 15. This drip leg functions as a trap for dirt and

condensate.

5. Install an accessible, external, manual main shutoff valve

in gas supply pipe within 6 ft of heating section.

6. Install ground-joint union close to heating section be-

tween unit manual shutoff and external manual main shut-

off valve.

7. Pressure-test all gas piping in accordance with local and

national plumbing and gas codes before connecting pip-

ing to unit.

NOTE: Pressure test the gas supply system after the gas

supply piping is connected to the gas valve. The supply

piping must be disconnected from the gas valve during

the testing of the piping systems when test pressure is in

excess of 0.5 psig. Pressure test the gas supply piping

system at pressures equal to or less than 0.5 psig. The

unit heating section must be isolated from the gas piping

system by closing the external main manual shutoff valve

and slightly opening the ground-joint union.

Fig. 14 — Condensate Trap

Table 1 — Physical Data — Unit 48SS

UNIT SIZE 48SS 018040 024040 024060 030040 030060 030080 036060 036080 036100 036120

NOMINAL CAPACITY (ton) 1

⁄

222

⁄

3333

OPERATING WEIGHT (lb)

Without Base Rail 272 303 315 320 332 332 336 336 348 348

With Optional Base Rail 296 327 339 344 356 356 360 360 372 372

COMPRESSORS Rotary Reciprocating

Quantity 11

REFRIGERANT (R-22)

Charge (lb) 2.60 2.75 2.75 3.40 3.40 3.40 4.30 4.30 4.30 4.30

REFRIGERANT METERING DEVICE Acutrol™ Device

Oriﬁce ID (in.) .030 .030 .030 .030 .030 .030 .032 .032 .032 .032

CONDENSER COIL

Rows...Fins/in. 1...17 1...17 1...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17

Face Area (sq ft) 5.95 5.95 5.95 5.95 5.95 5.95 5.95 5.95 5.95 5.95

CONDENSER FAN

Nominal Cfm 1700 1700 1700 1900 1900 1900 1900 1900 1900 1900

Diameter (in.) 18 18 18 18 18 18 18 18 18 18

Motor Hp (Rpm)

⁄

(850)

⁄

(850)

⁄

(850)

⁄

(850)

⁄

(850)

⁄

(850)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

EVAPORATOR COIL

Rows Fins/in.

3...15 3...15 3...15 3...15 3...15 3...15 3...15 3...15 3...15 3...15

Face Area (sq ft) 1.83 2.29 2.29 2.29 2.29 2.29 3.06 3.06 3.06 3.06

EVAPORATOR FAN Direct Drive

Nominal Airﬂow (Cfm) 600 800 800 1000 1000 1000 1200 1200 1200 1200

Size (in.) 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10

Motor Hp

⁄

FURNACE SECTION*

Burner Oriﬁce (Qty...drill size)

Natural Gas

1...32 1...32 2...40 1...32 2...40 2...32 2...40 2...32 2...30 3...32

Burner Oriﬁce (Qty...drill size)

Propane Gas

1...41 1...41 2...47 1...41 2...47 2...42 2...47 2...42 2...40 3...42

RETURN-AIR FILTERS (in.)†

Throwaway 20x20 20x20 20x20 20x24 20x24 20x24 20x24 20x24 20x24 20x24

UNIT SIZE 48SS 042060 042080 042100 042120 048080 048100 048120 048140 060080 060100 060120 060140

NOMINAL CAPACITY (ton) 3

⁄

44445555

OPERATING WEIGHT (lb)

Without Base Rail 375 375 387 387 414 426 426 426 453 465 465 465

With Optional Base Rail 399 399 411 411 438 450 450 450 477 489 489 489

COMPRESSORS Reciprocating Hermetic Scroll

Quantity 11

REFRIGERANT (R-22)

Charge (lb) 5.20 5.20 5.20 5.20 6.50 6.50 6.50 6.50 7.00 7.00 7.00 7.00

REFRIGERANT METERING Acutrol Device

DEVICE

Oriﬁce ID (in.) .034 .034 .034 .034 .030 .030 .030 .030 .030 .030 .030 .030

CONDENSER COIL

Rows...Fins/in. 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17

Face Area (sq ft) 7.04 7.04 7.04 7.04 8.67 8.67 8.67 8.67 8.67 8.67 8.67 8.67

CONDENSER FAN

Nominal Cfm 1900 1900 1900 1900 2400 2400 2400 2400 2400 2400 2400 2400

Diameter (in.) 18 18 18 18 20 20 20 20 20 20 20 20

Motor Hp (Rpm)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

EVAPORATOR COIL

Rows Fins/in. 3...15 3...15 3...15 3...15 3...15 3...15 3...15 3...15 4...15 4...15 4...15 4...15

Face Area (sq ft) 3.33 3.33 3.33 3.33 4.44 4.44 4.44 4.44 4.44 4.44 4.44 4.44

EVAPORATOR FAN Direct Drive

Nominal Airﬂow (Cfm) 1400 1400 1400 1400 1600 1600 1600 1600 1995 1995 1995 1995

Size (in.) 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x11 10x11 10x11 10x11

Motor Hp

⁄

1111

FURNACE SECTION*

Burner Oriﬁce (Qty...drill size)

Natural Gas

2...40 2...32 2...30 3...32 2...32 2...30 3...32 3...31 2...32 2...30 3...32 3...31

Burner Oriﬁce (Qty...drill size)

Propane Gas

2...47 2...42 2...40 3...42 2...42 2...40 3...42 3...40 3...42 2...40 3...42 3...40

RETURN-AIR FILTERS (in.)†

Throwaway 24x24 24x24 24x24 24x24 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30

*Based on altitude of 0-2000 feet.

†Required ﬁlter sizes shown are based on the larger of the ARI (Air Conditioning & Refrigeration Institute) rated cool-

ing airﬂow or the heating airﬂow at a velocity of 300 ft/min for throwaway type or 450 ft/min for high-capacity type.

For non-standard air ﬁlters, air ﬁlter pressure drop must not exceed 0.08 in. wg.

Table 2 — Physical Data — Unit 48SX

UNIT SIZE 48SX 024040 024060 030040 030060 030080 036060 036080 036100 036120

NOMINAL CAPACITY (ton) 222

⁄

3333

OPERATING WEIGHT (lb)

Without Base Rail 333 345 336 348 348 366 366 378 378

With Optional Base Rail 357 369 360 372 372 390 390 402 402

COMPRESSORS Scroll

Quantity 1

REFRIGERANT (R-22)

Charge (lb) 3.9 3.9 4.5 4.5 4.5 5.4 5.4 5.4 5.4

REFRIGERANT METERING DEVICE Acutrol™ Device

Oriﬁce ID (in.) .034 .034 .030 .030 .030 .032 .032 .032 .032

CONDENSER COIL

Rows...Fins/in. 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17

Face Area (sq ft) 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0

CONDENSER FAN

Nominal Cfm 2200 2200 2200 2200 2200 2200 2200 2200 2200

Diameter (in.) 20 20 20 20 20 20 20 20 20

Motor Hp (Rpm)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

EVAPORATOR COIL

Rows Fins/in.

2...15 2...15 3...15 3...15 3...15 4...15 4...15 4...15 4...15

Face Area (sq ft) 3.6 3.6 2.7 2.7 2.7 3.6 3.6 3.6 3.6

EVAPORATOR FAN* Direct Drive

Nominal Airﬂow (Cfm) 800 800 1000 1000 1000 1200 1200 1200 1200

Size (in.) 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10

Motor Hp

⁄

FURNACE SECTION†

Burner Oriﬁce (Qty...drill size)

Natural Gas

1...32 2...40 1...32 2...40 2...32 2...40 2...32 2...30 3...32

Burner Oriﬁce (Qty...drill size)

Propane Gas

1...41 2...47 1...41 2...47 2...42 2...47 2...42 2...40 3...42

RETURN-AIR FILTERS (in.)**

Disposable 24x24 24x24 24x24 24x24 24x24 24x24 24x24 24x24 24x24

UNIT SIZE 48SX 042060 042080 042100 042120 048080 048100 048120 048140 060080 060100 060120 060140

NOMINAL CAPACITY (ton) 3

⁄

44445555

OPERATING WEIGHT (lb)

Without Base Rail 391 391 403 403 422 434 434 434 453 465 465 465

With Optional Base Rail 415 415 427 427 446 458 458 458 477 489 489 489

COMPRESSORS Scroll

Quantity 1

REFRIGERANT (R-22)

Charge (lb) 5.7 5.7 5.7 5.7 5.8 5.8 5.8 5.8 7.00 7.00 7.00 7.00

REFRIGERANT METERING Acutrol Device

DEVICE

Oriﬁce ID (in.) .034 .034 .034 .034 .034 .034 .034 .034 .030 .030 .030 .030

CONDENSER COIL

Rows...Fins/in. 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17

Face Area (sq ft) 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.67 8.67 8.67 8.67

CONDENSER FAN

Nominal Cfm 2400 2400 2400 2400 2400 2400 2400 2400 2400 2400 2400 2400

Diameter (in.) 20 20 20 20 20 20 20 20 20 20 20 20

Motor Hp (Rpm)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1100)

⁄

(1050)

⁄

(1050)

⁄

(1050)

⁄

(1050)

EVAPORATOR COIL

Rows Fins/in. 3...15 3...15 3...15 3...15 4...15 4...15 4...15 4...15 4...15 4...15 4...15 4...15

Face Area (sq ft) 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.44 4.44 4.44 4.44

EVAPORATOR FAN* Direct Drive

Nominal Airﬂow (Cfm) 1400 1400 1400 1400 1600 1600 1600 1600 1995 1995 1995 1995

Size (in.) 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x11 10x11 10x11 10x11

Motor Hp

⁄

1111

FURNACE SECTION†

Burner Oriﬁce (Qty...drill size)

Natural Gas

2...40 2...32 2...30 3...32 2...32 2...30 3...32 3...31 2...32 2...30 3...32 3...31

Burner Oriﬁce (Qty...drill size)

Propane Gas

2...47 2...42 2...40 3...42 2...42 2...40 3...42 3...40 3...42 2...40 3...42 3...40

RETURN-AIR FILTERS (in.)**

Disposable 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30

*Size 048 evaporator fan is equipped with a 460-v or integrated control motor (ICM). Size 060 evaporator fan is

equipped with an ICM only. The ICM provides variable speed.

†Based on an altitude of 0-2000 feet.

**Required ﬁlter sizes shown are based on the ARI (Air Conditioning & Refrigeration Institute) rated heating airﬂow

at a velocity of 300 ft/min for throwaway type or 450 ft/min for high-capacity type. For non-standard air ﬁlters, air

ﬁlter pressure drop must not exceed 0.08 in. wg.

(Text continued from page 13)

Unstable operation may occur when the gas valve

and manifold assembly are forced out of position while

connecting improperly-routed rigid gas piping to the

gas valve. Use a backup wrench when making con-

nection to avoid strain on, or distortion of, the gas

control piping.

If a ﬂexible conductor is required or allowed by the

authority having jurisdiction, black iron pipe shall

be installed at the gas valve and shall extend a mini-

mum of 2 in. outside the unit casing.

Never use a match or other open ﬂame when check-

ing for gas leaks. Never purge gas line into com-

bustion chamber. Failure to follow this warning could

result in an explosion causing personal injury or death.

8. Check for gas leaks at the ﬁeld-installed and factory-

installed gas lines after all piping connections have been

completed. Use soap-and-water solution (or method speci-

ﬁed by local codes and/or regulations).

Step 9 — Install Duct Connections — The unit

has duct ﬂanges on the supply- and return-air openings on

the side and bottom of the unit. See Fig. 2-9 for connection

sizes and locations.

CONFIGURING UNITS FOR DOWNFLOW (VERTICAL)

DISCHARGE

Before performing service or maintenance operations on

the system, turn off main power to unit or electrical shock

could result.

1. Open all electrical disconnects before starting any serv-

ice work.

2. Remove return duct cover located on duct panel.

Figure 16 shows duct cover removed. Save duct cover

and screws.

3. Locate lances in basepan insulation that are placed over

the perimeter of the vertical duct opening cover

(Fig. 17).

4. Using a straight edge and sharp knife, cut and remove

the insulation around the perimeter of the cover. Re-

move and save 5 screws securing the cover to the base-

pan and slide out the cover. Discard the cover (Fig. 18).

5. Remove supply duct cover located on duct panel.

Figure 16 shows duct cover removed. Save duct cover

and screws.

6. Remove and discard 2 screws which secure vertical dis-

charge opening cover to basepan (Fig. 19). Slide cover

forward to disengage, then tilt and remove cover through

vertical discharge opening in bottom of unit. Discard duct

cover (Fig. 20).

Collect ALL screws that were removed. Do not leave

screws on rooftop as permanent damage to the roof

may occur.

7. If unit ductwork is to be attached to vertical opening

ﬂanges on the unit basepan (jackstand applications only),

do so at this time.

8. It is recommended that the basepan insulation around

the perimeter of the vertical return-air opening be se-

cured to the basepan with aluminum tape. Applicable

local codes may require aluminum tape to prevent ex-

posed ﬁberglass.

9. Cover both horizontal duct openings with the duct cov-

ers from Steps 2 and 5. Make sure opening is air- and

watertight.

10. After completing unit conversion, perform all safety checks

and power up unit.

NOTE: The design and installation of the duct system must

be in accordance with the standards of the NFPA for instal-

lation of nonresidence-type air conditioning and ventilating

systems, NFPA 90A or residence-type, NFPA 90B; and/or

local codes and residence-type, NFPA90B; and/or local codes

and ordinances.

Fig. 15 — Sediment Trap

Table 3 — Maximum Gas Flow Capacity*

NOMINAL

IRON PIPE,

SIZE

(in.)

INTERNAL

DIAMETER

(in.)

LENGTH OF PIPE, FT†

10 20 30 40 50 60 70 80 90 100 125 150 175 200

⁄

.622 175 120 97 82 73 66 61 57 53 50 44 40 — —

⁄

.824 360 250 200 170 151 138 125 118 110 103 93 84 77 72

1 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 135

⁄

1.380 1400 950 770 600 580 530 490 460 430 400 360 325 300 280

⁄

1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430

*Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or less. Pressure drop of 0.5-in. wg (based on

a 0.60 speciﬁc gravity gas). Refer to Table C-4, National Fire Protection Association NFPA 54.

†This length includes an ordinary number of ﬁttings.

SUPPLY DUCT OPENING RETURN DUCT OPENING

Fig. 16 — Supply and Return Duct Openings

Fig. 17 — Lance Location for Vertical Duct

Opening Cover

Fig. 18 — Vertical Duct Cover Removed

Fig. 19 — Removal of Vertical Discharge

Opening Cover

Adhere to the following criteria when selecting, sizing,

and installing the duct system:

1. Units are shipped with all 4 duct openings covered. Re-

move appropriate panels for intended installation.

2. Select and size ductwork, supply-air registers, and

return-air grilles according to American Society of

Heating, Refrigeration and Air Conditioning Engineers

(ASHRAE) recommendations.

3. Use ﬂexible transition between rigid ductwork and unit

to prevent transmission of vibration. The transition may

be screwed or bolted to duct ﬂanges. Use suitable gaskets

to ensure weathertight and airtight seal.

4. All units must have ﬁeld-supplied ﬁlters or accessory ﬁl-

ter rack installed in the return-air side of the unit. Rec-

ommended sizes for ﬁlters are shown in Tables 1 and 2.

5. Size all ductwork for maximum required airﬂow (either

heating or cooling) for unit being installed. Avoid abrupt

duct size increases or decreases or performance may be

affected.

6. Adequately insulate and weatherproof all ductwork

located outdoors. Insulate ducts passing through uncon-

ditioned space, and use vapor barrier in accordance with

latest issue of Sheet Metal and Air Conditioning

Contractors NationalAssociation (SMACNA) andAirCon-

ditioning Contractors of America (ACCA) minimum in-

stallation standards for heating and air-conditioning sys-

tems. Secure all ducts to building structure.

7. Flash, weatherproof, and vibration-isolate all openings in

building structure in accordance with local codes and good

building practices.

Step 10 — Install Electrical Connections

The unit cabinet must have an uninterrupted, unbroken

electrical ground to minimize the possibility of personal

injury if an electrical fault should occur. This ground

may consist of an electrical wire connected to the unit

ground lug in the control compartment, or conduit ap-

proved for electrical ground when installed in accor-

dance with NEC (National Electrical Code) ANSI/

NFPA (latest edition) (in Canada, Canadian Electrical

Code CSA [Canadian Standards Association] C22.1) and

local electrical codes. Do not use gas piping as an elec-

trical ground. Failure to adhere to this warning could

result in personal injury or death.

Failure to follow these precautions could result in dam-

age to the unit being installed:

1. Make all electrical connections in accordance with NEC

ANSI/NFPA(latest edition) and local electrical codes gov-

erning such wiring. In Canada, all electrical connections

must be in accordance with CSA standard C22.1 Cana-

dian Electrical Code Part 1 and applicable local codes.

Refer to unit wiring diagram.

2. Use only copper conductor for connections between ﬁeld-

supplied electrical disconnect switch and unit. DO NOT

USE ALUMINUM WIRE.

3. Be sure that high-voltage power to unit is within oper-

ating voltage range indicated on unit rating plate.

4. Do not damage internal components when drilling through

any panel to mount electrical hardware, conduit, etc. On

3-phase units, ensure phases are balanced within 2%. Con-

sult local power company for correction of improper volt-

age and/or phase imbalance.

HIGH-VOLTAGE CONNECTIONS — The unit must have

a separate electrical service with a ﬁeld-supplied, water-

proof, disconnect switch mounted at, or within sight from,

the unit. Refer to the unit rating plate for maximum fuse/

circuit breaker size and minimum circuit amps (ampacity)

for wire sizing. See Tables 4A and 4B for electrical data.

The ﬁeld-supplied disconnect switch box may be mounted

on the unit over the high-voltage inlet hole when the

standard power and low-voltage entry points are used. See

Fig. 2-9 for acceptable location.

Standard Power Entry — Proceed as follows to complete the

high-voltage connections to the unit:

1. Connect ground lead to chassis ground connection when

using separate ground wire.

2. Run high-voltage leads into unit control box.

3. Locate black and yellow wires connected to line side of

contactor.

4. Cut wires at partition where they exit control box.

5. Strip back leads and connect to high voltage leads. On

3-phase units, blue wire is provided stripped back and

ready to connect to high voltage lead. See unit wiring la-

bel and Fig. 21.

Fig. 20 — Vertical Discharge Cover Removed

Table 4A — Electrical Data — Unit 48SS

UNIT

SIZE

48SS

V-PH-Hz

VOLTAGE

RANGE

COMPRESSOR

OUTDOOR-FAN

MOTOR

INDOOR-FAN

MOTOR

POWER SUPPLY

AWG60C

MIN WIRE

SIZE

MAX WIRE

LENGTH (ft)

Min Max RLA LRA FLA FLA MCA MOCP*

018 208/230-1-60 187 253 8.3 45.0 0.7 1.8 12.9 15 14 75

024 208/230-1-60 187 253 12.4 61.0 0.7 2.0 18.2 30 12 80

030

208/230-1-60 187 253 14.4 82.0 1.4 2.3 21.4 30 10 100

208/230-3-60 187 253 9.4 66.0 1.4 2.0 15.1 25 12 80

036

208/230-1-60 187 253 18.0 96.0 1.4 2.8 26.7 40 10 90

208/230-3-60 187 253 11.7 75.0 1.4 2.8 18.8 30 12 65

460-3-60 414 506 5.6 40.0 0.8 1.4 9.2 10 14 100

042

208/230-1-60 187 253 20.4 104.0 1.4 4.0 30.9 50 8 100

208/230-3-60 187 253 14.0 91.0 1.4 4.0 22.9 35 10 85

460-3-60 414 506 6.4 42.0 0.8 2.0 10.8 15 14 100

048

208/230-1-60† 187 253 21.8 124.0 2.1 5.0 40.1 60 8 100

208/230-1-60** 187 253 26.4 129.0 2.1 5.0 40.1 60 6 100

208/230-3-60† 187 253 12.8 93.0 2.1 5.0 25.9 40 10 75

208/230-3-60** 187 253 15.0 99.0 2.1 5.0 25.9 40 10 75

460-3-60† 414 506 6.4 46.5 1.1 2.3 13.7 20 14 100

460-3-60** 414 506 8.2 50.0 1.1 2.3 13.7 20 14 100

060

208/230-1-60 187 253 32.1 169.0 2.1 6.8 49.0 60 6 100

208/230-3-60 187 253 19.3 123.0 2.1 6.8 33.0 50 8 90

460-3-60 414 506 10.0 62.0 1.1 3.2 16.8 25 12 100

LEGEND

AWG — American Wire Gage

FLA — Full Load Amps

HACR — Heating, Air Conditioning and

Refrigeration

LRA — Locked Rotor Amps

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

RLA — Rated Load Amps

*Fuse or HACR Breaker.

† Carrier Scroll Compressor.

**Copeland Scroll Compressor.

NOTES:

1. In compliance with NEC (National Electrical Code) requirements

for multimotor and combination load equipment (refer to NEC

Articles 430 and 440), the overcurrent protective device for the

unit shall be fuse or HACR breaker. The CGA (Canadian Gas As-

sociation) units may be fuse or circuit breaker.

2. Minimum wire size is based on 60 C copper wire. If other than

60 C wire is used, or if length exceeds wire length in table, de-

termine size from NEC.

3. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt-

age is greater than 2%.

Use the following formula to determine

the percentage of voltage imbalance.

% Voltage imbalance

max voltage deviation from average voltage

= 100 x

average voltage

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

452 1 464 1 455

Average Voltage =

1371

= 457

Determine maximum deviation from average voltage.

(AB) 457 − 452=5v

(BC) 464 − 457=7v

(AC) 457 − 455=2v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the

maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is

more than 2%, contact your local electric utility company

immediately.

Table 4B — Electrical Data — Unit 48SX

UNIT

SIZE

48SX

V-PH-Hz

VOLTAGE

RANGE

COMPRESSOR

OUTDOOR-FAN

MOTOR

INDOOR-FAN

MOTOR

POWER SUPPLY

AWG60C

MIN WIRE

SIZE

MAX WIRE

LENGTH (ft)

Min Max RLA LRA FLA FLA MCA MOCP*

024 208/230-1-60 187 253 12.9 62.5 1.4 2.0 19.5 30 12 75

030 208/230-1-60 187 253 15.0 76.0 1.4 2.6 22.8 30 10 100

036

208/230-1-60 187 253 16.7 95.0 1.4 2.8 25.1 30 10 95

208/230-3-60 187 253 10.9 75.0 1.4 2.8 17.8 25 12 70

460-3-60 414 506 5.4 40.0 0.8 1.4 9.0 10 14 100

042

208/230-1-60 187 253 20.0 104.0 1.4 3.1 29.5 45 10 80

208/230-3-60 187 253 13.9 88.0 1.4 3.1 21.9 30 10 60

460-3-60 414 506 6.8 44.0 0.8 1.6 10.9 15 14 100

048

208/230-1-60 187 253 26.4 129.0 1.4 7.2 41.6 60 6 100

208/230-3-60 187 253 15.0 99.0 1.4 7.2 27.4 40 10 70

460-3-60 414 506 8.2 49.5 0.8 2.3 13.4 20 14 100

060

208/230-1-60 187 253 32.1 169.0 2.1 7.2 49.4 60 6 100

208/230-3-60 187 253 19.3 123.0 2.1 7.2 33.4 50 8 90

LEGEND

AWG — American Wire Gage

FLA — Full Load Amps

HACR — Heating, Air Conditioning and

Refrigeration

LRA — Locked Rotor Amps

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

RLA — Rated Load Amps

*Fuse or HACR Breaker.

† Carrier Scroll Compressor.

**Copeland Scroll Compressor.

NOTES:

1. In compliance with NEC (National Electrical Code) requirements

for multimotor and combination load equipment (refer to NEC

Articles 430 and 440), the overcurrent protective device for the

unit shall be fuse or HACR breaker. The CGA (Canadian Gas As-

sociation) units may be fuse or circuit breaker.

2. Minimum wire size is based on 60 C copper wire. If other than

60 C wire is used, or if length exceeds wire length in table, de-

termine size from NEC.

3. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt-

age is greater than 2%.

Use the following formula to determine

the percentage of voltage imbalance.

% Voltage imbalance

max voltage deviation from average voltage

= 100 x

average voltage

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

452 1 464 1 455

Average Voltage =

1371

= 457

Determine maximum deviation from average voltage.

(AB) 457 − 452=5v

(BC) 464 − 457=7v

(AC) 457 − 455=2v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the

maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is

more than 2%, contact your local electric utility company

immediately.

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Carrier 48SX024-060 User manual

Brand: Carrier

Model: 48SX024-060

Category: Split-system air conditioners

Type: User manual

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Carrier 48SX024-060 User manual

Carrier 48SX024-060 User manual

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